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how do you use opengl?

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when i use opengl its just a black screen is there anyway to make it work without getting a new video card?

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Get this: http://www.ozone3d.net/gpu_caps_viewer/

Then look at your specs and try the benchmarks. Report back then. Different OpenGL ports have different requirements, by the way, so precise whether you're using Doomsday, EDGE, GZDoom, Vavoom, etc.

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For instance, DoomLegacy uses SDL to interface to opengl.
If you were using direct X-windows or one of the other direct ports, then opengl access would be questionable.
SDL will use some kind of software opengl, if it has to. With the proper hardware drivers (like nVidia drivers) the opengl works much faster.

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